CyberKnife

CyberKnife was invented at Stanford Health Care and is used to treat
a variety of conditions, with one of the most technologically-advanced
forms of radiosurgery. CyberKnife stereotactic radiosurgery uses
computer technology that allows doctors to deliver radiation with
unprecedented precision. Unlike other radiosurgery technologies, the
CyberKnife does not use uncomfortable screws or frames to immobilize
patients during treatment.

The CyberKnife is capable of treating tumors anywhere in the body.
At Stanford, CyberKnife technology is commonly used for treatment of
tumors and conditions of the brain and spine, in addition to cancers
of the pancreas, prostate, liver, and lungs.